日降水的稳定同位素变异性:英格兰东南部低成本收集器的启示。

IF 1.1 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR
Jonathan Holmes, Anne-Lise Jourdan, W George Darling
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引用次数: 0

摘要

降水稳定同位素数据经常被用于水文气候、水文和水文地质调查,通常是对每月的综合样本进行测量。然而,每日取样揭示了控制降水同位素值的一些被忽视的方面,包括同步气象条件。我们展示了 2021 年期间英国东南部靠近大伦敦地区的一个站点每日降水中稳定同位素的一年记录。我们发现这一年中每天的变化都很明显(δ18O 为 -15.62 至 +0.92 ‰,δ2H 为 -108.7 至 +2.9 ‰,氘过量为 -6.5 至 +23.1 ‰)。与个别气象变量(包括降水量、温度和天气类型)的相关性为中等至弱,表明对日降水同位素值的控制是复杂的。日数据与英格兰其他三个日数据集进行了比较,并通过转换为月值,直接与英国和爱尔兰三个长期收集站的数据进行了比较。尽管我们站点的日数据来自不同时期,但其变化范围与英国其他记录一致。月度数据显示出广泛的一致性,但也存在差异,这也凸显了整个不列颠群岛降水值的地理变异性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stable-isotope variability in daily precipitation: insights from a low-cost collector in SE England.

Precipitation stable-isotope data are often used in hydroclimatic, hydrological and hydrogeological investigations, with measurements typically undertaken on integrated monthly samples. However, daily sampling reveals overlooked aspects of controls on precipitation isotope values, including synoptic meteorological conditions. We present a one-year record of stable isotopes in daily precipitation during 2021, from a site in SE England close to Greater London. We find marked daily variability over the course of the year (-15.62 to +0.92 ‰ for δ18O, -108.7 to +2.9 ‰ for δ2H and -6.5 to +23.1 ‰ for deuterium excess). Correlations with individual meteorological variables including precipitation amount, temperature and weather type are moderate to weak suggesting complex controls on the daily rainfall isotope values. The daily data are compared with three other daily datasets from England and, by conversion to monthly values, directly with data from three long-term collection stations across Britain and Ireland. The scale of variability in the daily data from our site is consistent with that seen in other English records despite them all coming from different time periods. The monthly data show broad consistency, although there are differences that also highlight geographical variability in precipitation values across the British Isles.

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来源期刊
CiteScore
2.80
自引率
7.70%
发文量
21
审稿时长
3.0 months
期刊介绍: Isotopes in Environmental and Health Studies provides a unique platform for stable isotope studies in geological and life sciences, with emphasis on ecology. The international journal publishes original research papers, review articles, short communications, and book reviews relating to the following topics: -variations in natural isotope abundance (isotope ecology, isotope biochemistry, isotope hydrology, isotope geology) -stable isotope tracer techniques to follow the fate of certain substances in soil, water, plants, animals and in the human body -isotope effects and tracer theory linked with mathematical modelling -isotope measurement methods and equipment with respect to environmental and health research -diagnostic stable isotope application in medicine and in health studies -environmental sources of ionizing radiation and its effects on all living matter
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